package com.sky.controller.admin;

import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;

@Slf4j
@RestController
@RequestMapping("/admin/dish")
@Api(tags = "菜品相关接口")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("查询分类下的菜品：{}", categoryId);

        // 构造reids中的key
        String key = "dish_"+ categoryId;

        // 查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if(list != null && list.size() > 0){
            // 若存在则直接返回，无需查询数据库
            log.info("redis中存在数据：{}", list);
            return Result.success(list);
        }

        // 如果不存在，查询数据库，将数据放入redis中
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

        list = dishService.listWithFlavor(dish);
        redisTemplate.opsForValue().set(key,list);
        return Result.success(list);
    }

    @PostMapping
    @ApiOperation("添加菜品")
    public Result save(@RequestBody DishDTO dishDTO){
        log.info("新增菜品：{}", dishDTO);
        dishService.saveWithFlavor(dishDTO);
        cleanCache("dish_"+dishDTO.getCategoryId());
        return Result.success();
    }

    /**
     * 菜品查询
     * @param dishPageQueryDTO
     * @return
     */
    @GetMapping("/page")
    @ApiOperation("菜品查询")
    public Result<PageResult> page(DishPageQueryDTO dishPageQueryDTO){
        log.info("菜品查询参数：{}", dishPageQueryDTO);
        PageResult result =  dishService.pageQuery(dishPageQueryDTO);
        return Result.success(result);
    }

    /**
     * 批量删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    @ApiOperation("批量删除菜品")
    public Result delete(@RequestParam List<Long> ids){
        log.info("批量删除菜品：{}", (Object) ids);
        dishService.deleteBatch(ids);
        // 将所有的菜品缓存数据清除掉，所有以dish_开头的key.
        cleanCache("dish_*");
        return Result.success();
    }

    /**
     * 菜品起售停售
     * @param status
     * @param id
     * @return
     */
    @PostMapping("/status/{status}")
    @ApiOperation("菜品起售停售")
    public Result<String> startOrStop(@PathVariable Integer status, Long id){
        dishService.startOrStop(status,id);
        cleanCache("dish_*");
        return Result.success();
    }


    @GetMapping("/{id}")
    @ApiOperation("Id查询菜品")
    public Result<DishVO> getById(@PathVariable Long id){
        log.info("根据Id查询菜品：{}", id);
        DishVO dishVO = dishService.getByIdWithFlavor(id);
        return Result.success(dishVO);
    }

    @PutMapping()
    @ApiOperation("修改菜品")
    public Result update(@RequestBody DishDTO dishDTO){
        log.info("修改菜品：{}", dishDTO);
        dishService.updateWithFlavor(dishDTO);

        // 将所有的菜品缓存数据清除掉，所有以dish_开头的key.
        cleanCache("dish_*");

        return Result.success();
    }

    private void cleanCache(String pattern){
        Set keys = redisTemplate.keys(pattern);
        redisTemplate.delete(keys);
    }

}
